correspondence\cor`re*spond"ence\ (-sp?nd"ens), n. [cf. f. correspondance.]1. friendly intercourse; reciprocal exchange of civilities; especially, intercourse between persons by means of letters. holding also good correspondence with the other great men in the state. to facilitate correspondence between one part of london and another, was not originally one of the objects of the post office.2. the letters which pass between correspondents.3. mutual adaptation, relation, or agreement, of one thing to another; agreement; congruity; fitness; relation.correspondence n1. communication by the exchange of letters2. compatibility of observations; "there was no agreement between theory and measurement"; "the results of two tests were in correspondence" [syn: agreement]

3. the relation of correspondence in degree or size or amount [syn: commensurateness, proportionateness]

4. a function such that for every element of one set there is a unique element of another set [syn: mapping, map]

5. communication by exchange of letters6. (mathematics) an attribute of a shape; exact correspondence of form on opposite sides of a dividing line or plane [syn: symmetry, symmetricalness, balance] [ant: asymmetry]